Machine for printing from intaglio printing-plates.



a H. A. w. WOOD. MACHINE FOR PRINTING FROM INTAGLIO PRINTING PLATES.

APPLICATION IILED APR. 23, 1906.

Patented Oct. 7, 1913.

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H. A. W. WOOD. MACHINE FOR PRINTING FROM INTAGLIO PRINTING PLATES.

. APPLICATION FILED 11193.23, 1906.

1,074,765. Patented Oct. 7, 1913.

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ID 785886: yfltowu SWSW UNITED STATES PATENT OFFICE.

HENRY A. WISE WOOD, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS,

TO WOOD & NATHAN COMPANY, OF NEW YORK.

YORK, N. Y., A CORPORATION OF NEW MACHINE FOR PRINTING FROM IN TAGLIO PRINTING-PLATES.

Specification of Letters Patent.

Patented Oct. 7, 1913.

Application filed April 23, 1906. Serial No. 313,118.

The invention while capable of generaluse is especially applicable for use in color printing.

Reference is. to be had to the accompanying drawing forming part of this specification and illustrating the invention as applied to a three-color printing press in which,

Figure -1 is a side elevation partly in section of a press with one form of my improvements applied thereto. Fig. 2 is a sectional-view on an enlarged scale of a. portion of the press showing additional details. Fig. 3 is a side elevation of the gearing, and Figs. 4: and 5 are fragmentary views of a portion of Fig. 1 showing the parts in two different positions.

In the form of press illustrated, an impression cylinder a, of the two-revolution type is employed. In such a machine as this, the cyhnder constitutes means for supporting individual sheets to be printed and makes two revolutions for each sheet printed, one revolution to print and one to deliver. The cylinder is provided with grippers b which, upon reaching the point 0 at which the sheets are delivered, grip them and carry them around the cylinder in the direction of the arrow. I have shown a plurality of printing cylinders 03, e, and f,

any one or more of which can be employed .for printing. In the three-color presses,

each cylinder is provided with plates and in accordance with my invention, some or all of these plates are of the mtagho character.

The printing is all done during one the machine is provided, so as to carry it to the fly fingers 2' which deliver in any desired manner. On this revolution,.the grippers do not take on a sheet at the point 0. The plate cylinders d, e, and f carry print ing plates which can be in the form of shells, small plates, or blocks, approximately the size of the several designs. These plates are held on the cylinders in the usual or any desired manner. The plate cylinders may be moved up to the impression cylinder and kept there during the printing revolution and moved away from it during the delivery revolution. This movement may be accomplished in the usual manner by means of connections is and eccentrics Z, or the like.

The cylinders may be driven by gearing m, indicated in Fig. 8, so as to make a plurality of revolution to each impression which they give off and they are preferably made adjustable along slots n by means of bolts 0; also by means of collars and screws connected with the ends of the shafts upon which the cylinders are mounted. The plate cylindersare adjustable toward and from the impression cylinder by means of screws 79 and adjusting nuts 9, or any other convenient form of adjustment may be employed.

The inking of the plates is accomplished by meansof rolls 1" which run in a trough of ink. v

In connection with the cylinder at the right end of Fig. 1 a roll a is shown applying ink to the inking roll 1', this construction being provided for the purpose of giving more room for the fountain. When the ink is applied to the plates by means of the rollers described or in any other manner, it fills the design of the intaglio plate and all surplus must be wiped or scraped off. For this purpose I have provided a series of blades t, each one being held in contact with the surface of its cylinder, preferably by means of a counterweight u, the blade and counter-weight being pivotally mounted on a shaft 21.

In printing from intaglio plates the nonprinting surface must obviously be kept immaculately clean because it comes against portions of the sheet which are to kept white. If in printing several colors one after the other, the ink from the first color is deposited on the second plate, it will mix with the ink in the second color, which is of course injurious. I have therefore provided means for preventing this. I have shown this means in the form of blades to pivotally mounted on shafts m and provided with counter-weights '0, the construction being similar to the blades 25 and their connections. The counter-weights keep the blades yieldingly in contact with the cylinders. It will of course be noticed that the blades w are not necessarily used on the first plate cylinder but are used on all thein such position that the one at the left should move to the left while the others move to the right during the delivery revolution of the impression cylinder. In order, if it is desired, to provide for keeping the scraping blades out of contact with the plate cylinders during the idle revolutions thereof and thus reducing the Wear, I have provided a roller .2 connected with each of the two shafts w and a similar roller is also connected with the left-hand shaft '0. These rollers are mounted on arms on the shafts, which are shorter than the arms carrying the cleaning blades and the rollers are, in such position as to bear on the plate cylinders at a point between the shaft and the point at which the scraper bears on the cylinder,consequently when the cylinder moves in that direction, it will move the roller a certain distance and the point of the scraper a greater distance and keep the scraper away from the late cylinder as is clearly indicated in Fig. ,5. On the opposite side of the cylinders except the first one, the blade t is so located that the cylinder can move away from it, but in order to prevent the counterweight from turning the scraper into such position as to remain in engagement with the cylinder, I have provided a stop a for the counter-weight, this stop being located in such position as to keep the scraper out of engagement with the cylinder as 1s indicated at the left of Fig. 5.

As the impression cylinder revolves, the

intaglioplates on the cylinders d, e and f' make a plurality of impressions in difierent colors. These plates receive ink in a manner which has been described and after the ink has been deposited upon each one, the

'- cleaning blade 6 scrapes the surplus ink from the surface of the intaglio lates for the purpose above set forth. As t e surface of each late cylinder makes its impression on the s eet on the impression cylinder and passes around in the direction shown by the' arrows, it is again cleaned by the cleaning blade w. This is, as has been stated, for the purpose of removing any ink which has been deposited upon the plates by the sheet itself,

this sheet having been previously inked by another roller carrying a different color. It will be seen, therefore, that by the employment of the principles set forth above,

whether in the form illustrated or not, an

eflicient Way of operating three-color printing and other presses with intaglio plates is secured.

It is to be understood that while I have described a particular press for use with my invention and a particular form of mechanism for application to the press, I am aware that many modifications may be made in the mechanism and that it can be applied to many kinds of presses in accordance with the spirit of my invention as expressed in the claims and consequently I do not wish to be limited to the exact construction shown, but

What I do claim and desire to secure by Letters Patent is 1. A printing press having means for supporting an intaglio plate movable to and from operative position, for said plate, means for yieldingly holding the cleaning device in position to engage the printing surface of the plate when the supporting means is in operativefposition, said cleaning device being movable out of position, and means for holding the cleaning device out of contact with the plate when the supporting means is out of operative position.

2. A printing press having means for supporting a printing plate, said means being movable out of operative position, a cleaning device for the printing plate, and means for holding the cleaning device and plate out of contact with each other when said the printing surface.

4. In-a printing press, the combination of a plateholding device, a shaftv mounted adjacent thereto, on said shaft and adapted to engage the printing surface, and a roller connected with said shaft and resting on the printing sura cleaning device mounteda cleaning device face, said roller located between said shaft and the point at which the plate engages the printing surface, whereby motion of the printin surface toward e roller will move the c caning device out of engages ment with the printing surface said shaft for yieldingly hol engages the cylinder.

6. In a printing press, the combination of an impression cylinder, a plurality-of plate c linders mounted in caution to engage t 'e impression cylin or, means for moving said plate cylinders out of en agement with the impression cylinder, a 0 caning blade movably mounted adjacent to each plate cylinder and adapted to engage the surface thereof,-means or yieldingly holding said blades in engagement withuthe late cylinders, and means for holding said lades out of engagement with the plate cylinders when said plate cylinders are moved away from the impression cylinder.

7. In a printing press, the combination of an impression cylinder, a plurality of plate cylinders mounted adjacent thereto and adapted to engage the surfacethereof, means for moving said plate cylinders out of engagement with said im ression cyl inder, a cleaning blade movab adjacentto ,each plate cylinder on the side toward which said cylinders move,.means ly mounted for holdin said blades in engagement with said cylin ers when the cylinders are in engagement with the impression cylinder and means for holding said bladesout 0 engagement with said cylinders when said cylinders are out of engagement with the impression cylinder.

8. In a printing press, the combination of an impression cylinder, a plurality of plate cyhnders mounted adjacent thereto and adapted to engage the surface thereof, means for moving said plate cylindersout of engagement with said impression cylinder, a cleaning blade mova ly mounted adjacentto each plate cylinder on the side toward which said cylinders move, means for holding said blades in en gement with said cylin ers when the cy ders are in engagement with the impression cylinder, means for holding said blades out of. engafement with said cylinderswhen said cylm are are out of en gement with the impression cylinder, ad tlonal cleanin blades mounted adjacent to certain of sai' plate cylinders, means for normally holding said last mentioned blades in engagement with the plate cylinders when the atter are in engagement with the impression cylinder, and a stop for preventing the last mentioned blades from moving with the plate cylinders when they are moved out of engagement with the impression cylinder.

In testimon whereof I have hereunto set my hand, in e presence of two subscribing witnesses. V a

H. A. WISE WOOD. Witneses:

Anm B. Wm,

Many E. MOCADDEN. 

